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Reject XR TargetBitrate items with unsupported layer indices

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Specifically, reject any bitrate allocated for a layer not representable
by the BitrateAllocation struct.

BUG=chromium:671312

Review-Url: https://codereview.webrtc.org/2549233005
Cr-Commit-Position: refs/heads/master@{#15447}
This commit is contained in:
sprang
2016-12-06 06:08:53 -08:00
committed by Commit bot
parent 99cc10ff40
commit 6d314c7a88
3 changed files with 34 additions and 8 deletions
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12
webrtc/common_types.cc
View File

@ -154,9 +154,9 @@ BitrateAllocation::BitrateAllocation() : sum_(0), bitrates_{} {}
bool BitrateAllocation::SetBitrate(size_t spatial_index,
size_t temporal_index,
uint32_t bitrate_bps) {
RTC_DCHECK_LT(spatial_index, kMaxSpatialLayers);
RTC_DCHECK_LT(temporal_index, kMaxTemporalStreams);
RTC_DCHECK_LE(bitrates_[spatial_index][temporal_index], sum_);
RTC_CHECK_LT(spatial_index, kMaxSpatialLayers);
RTC_CHECK_LT(temporal_index, kMaxTemporalStreams);
RTC_CHECK_LE(bitrates_[spatial_index][temporal_index], sum_);
uint64_t new_bitrate_sum_bps = sum_;
new_bitrate_sum_bps -= bitrates_[spatial_index][temporal_index];
new_bitrate_sum_bps += bitrate_bps;
@ -170,14 +170,14 @@ bool BitrateAllocation::SetBitrate(size_t spatial_index,
uint32_t BitrateAllocation::GetBitrate(size_t spatial_index,
size_t temporal_index) const {
RTC_DCHECK_LT(spatial_index, kMaxSpatialLayers);
RTC_DCHECK_LT(temporal_index, kMaxTemporalStreams);
RTC_CHECK_LT(spatial_index, kMaxSpatialLayers);
RTC_CHECK_LT(temporal_index, kMaxTemporalStreams);
return bitrates_[spatial_index][temporal_index];
}
// Get the sum of all the temporal layer for a specific spatial layer.
uint32_t BitrateAllocation::GetSpatialLayerSum(size_t spatial_index) const {
RTC_DCHECK_LT(spatial_index, kMaxSpatialLayers);
RTC_CHECK_LT(spatial_index, kMaxSpatialLayers);
uint32_t sum = 0;
for (int i = 0; i < kMaxTemporalStreams; ++i)
sum += bitrates_[spatial_index][i];

9
webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
View File

@ -22,6 +22,7 @@
#include "webrtc/base/checks.h"
#include "webrtc/base/logging.h"
#include "webrtc/base/trace_event.h"
#include "webrtc/common_types.h"
#include "webrtc/common_video/include/video_bitrate_allocator.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/bye.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/common_header.h"
@ -737,9 +738,17 @@ void RTCPReceiver::HandleXrTargetBitrate(
PacketInformation* packet_information) {
BitrateAllocation bitrate_allocation;
for (const auto& item : target_bitrate.GetTargetBitrates()) {
if (item.spatial_layer >= kMaxSpatialLayers ||
item.temporal_layer >= kMaxTemporalStreams) {
LOG(LS_WARNING)
<< "Invalid layer in XR target bitrate pack: spatial index "
<< item.spatial_layer << ", temporal index " << item.temporal_layer
<< ", dropping.";
} else {
bitrate_allocation.SetBitrate(item.spatial_layer, item.temporal_layer,
item.target_bitrate_kbps * 1000);
}
}
packet_information->target_bitrate_allocation.emplace(bitrate_allocation);
}

17
webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
View File

@ -1297,4 +1297,21 @@ TEST_F(RtcpReceiverTest, ReceivesTargetBitrate) {
InjectRtcpPacket(xr);
}
TEST_F(RtcpReceiverTest, HandlesIncorrectTargetBitrate) {
BitrateAllocation expected_allocation;
expected_allocation.SetBitrate(0, 0, 10000);
rtcp::TargetBitrate bitrate;
bitrate.AddTargetBitrate(0, 0, expected_allocation.GetBitrate(0, 0) / 1000);
bitrate.AddTargetBitrate(0, kMaxTemporalStreams, 20000);
bitrate.AddTargetBitrate(kMaxSpatialLayers, 0, 40000);
rtcp::ExtendedReports xr;
xr.SetTargetBitrate(bitrate);
EXPECT_CALL(bitrate_allocation_observer_,
OnBitrateAllocationUpdated(expected_allocation));
InjectRtcpPacket(xr);
}
} // namespace webrtc